19900996840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1\times {\mathrm{1487}}^1$

素因数の和:1823

約数の個数: 128

約数和(自身を含む): 47516958720

約数和(自身を除く): 27615961880

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 43, 62, 86, 124, 155, 172, 215, 248, 251, 310, 344, 430, 502, 620, 860, 1004, 1240, 1255, 1333, 1487, 1720, 2008, 2510, 2666, 2974, 5020, 5332, 5948, 6665, 7435, 7781, 10040, 10664, 10793, 11896, 13330, 14870, 15562, 21586, 26660, 29740, 31124, 38905, 43172, 46097, 53320, 53965, 59480, 62248, 63941, 77810, 86344, 92194, 107930, 127882, 155620, 184388, 215860, 230485, 255764, 311240, 319705, 334583, 368776, 373237, 431720, 460970, 511528, 639410, 669166, 746474, 921940, 1278820, 1338332, 1492948, 1672915, 1843880, 1866185, 1982171, 2557640, 2676664, 2985896, 3345830, 3732370, 3964342, 6691660, 7464740, 7928684, 9910855, 11570347, 13383320, 14929480, 15857368, 16049191, 19821710, 23140694, 32098382, 39643420, 46281388, 57851735, 64196764, 79286840, 80245955, 92562776, 115703470, 128393528, 160491910, 231406940, 320983820, 462813880, 497524921, 641967640, 995049842, 1990099684, 2487624605, 3980199368, 4975249210, 9950498420, 19900996840]

約数ペア:

[(1, 19900996840), (2, 9950498420), (4, 4975249210), (5, 3980199368), (8, 2487624605), (10, 1990099684), (20, 995049842), (31, 641967640), (40, 497524921), (43, 462813880), (62, 320983820), (86, 231406940), (124, 160491910), (155, 128393528), (172, 115703470), (215, 92562776), (248, 80245955), (251, 79286840), (310, 64196764), (344, 57851735), (430, 46281388), (502, 39643420), (620, 32098382), (860, 23140694), (1004, 19821710), (1240, 16049191), (1255, 15857368), (1333, 14929480), (1487, 13383320), (1720, 11570347), (2008, 9910855), (2510, 7928684), (2666, 7464740), (2974, 6691660), (5020, 3964342), (5332, 3732370), (5948, 3345830), (6665, 2985896), (7435, 2676664), (7781, 2557640), (10040, 1982171), (10664, 1866185), (10793, 1843880), (11896, 1672915), (13330, 1492948), (14870, 1338332), (15562, 1278820), (21586, 921940), (26660, 746474), (29740, 669166), (31124, 639410), (38905, 511528), (43172, 460970), (46097, 431720), (53320, 373237), (53965, 368776), (59480, 334583), (62248, 319705), (63941, 311240), (77810, 255764), (86344, 230485), (92194, 215860), (107930, 184388), (127882, 155620)]