21767890

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:175

約数の個数: 64

約数和(自身を含む): 43794432

約数和(自身を除く): 22026542

約数列:

[1, 2, 5, 10, 23, 31, 43, 46, 62, 71, 86, 115, 142, 155, 215, 230, 310, 355, 430, 710, 713, 989, 1333, 1426, 1633, 1978, 2201, 2666, 3053, 3266, 3565, 4402, 4945, 6106, 6665, 7130, 8165, 9890, 11005, 13330, 15265, 16330, 22010, 30530, 30659, 50623, 61318, 70219, 94643, 101246, 140438, 153295, 189286, 253115, 306590, 351095, 473215, 506230, 702190, 946430, 2176789, 4353578, 10883945, 21767890]

約数ペア:

[(1, 21767890), (2, 10883945), (5, 4353578), (10, 2176789), (23, 946430), (31, 702190), (43, 506230), (46, 473215), (62, 351095), (71, 306590), (86, 253115), (115, 189286), (142, 153295), (155, 140438), (215, 101246), (230, 94643), (310, 70219), (355, 61318), (430, 50623), (710, 30659), (713, 30530), (989, 22010), (1333, 16330), (1426, 15265), (1633, 13330), (1978, 11005), (2201, 9890), (2666, 8165), (3053, 7130), (3266, 6665), (3565, 6106), (4402, 4945)]