221357980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:144

約数の個数: 144

約数和(自身を含む): 540739584

約数和(自身を除く): 319381604

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 31, 38, 43, 46, 62, 76, 86, 92, 95, 115, 124, 155, 172, 190, 215, 230, 310, 361, 380, 430, 437, 460, 589, 620, 713, 722, 817, 860, 874, 989, 1178, 1333, 1426, 1444, 1634, 1748, 1805, 1978, 2185, 2356, 2666, 2852, 2945, 3268, 3565, 3610, 3956, 4085, 4370, 4945, 5332, 5890, 6665, 7130, 7220, 8170, 8303, 8740, 9890, 11191, 11780, 13330, 13547, 14260, 15523, 16340, 16606, 18791, 19780, 22382, 25327, 26660, 27094, 30659, 31046, 33212, 37582, 41515, 44764, 50654, 54188, 55955, 61318, 62092, 67735, 75164, 77615, 83030, 93955, 101308, 111910, 122636, 126635, 135470, 153295, 155230, 166060, 187910, 223820, 253270, 257393, 270940, 306590, 310460, 357029, 375820, 481213, 506540, 514786, 582521, 613180, 714058, 962426, 1029572, 1165042, 1286965, 1428116, 1785145, 1924852, 2330084, 2406065, 2573930, 2912605, 3570290, 4812130, 5147860, 5825210, 7140580, 9624260, 11067899, 11650420, 22135798, 44271596, 55339495, 110678990, 221357980]

約数ペア:

[(1, 221357980), (2, 110678990), (4, 55339495), (5, 44271596), (10, 22135798), (19, 11650420), (20, 11067899), (23, 9624260), (31, 7140580), (38, 5825210), (43, 5147860), (46, 4812130), (62, 3570290), (76, 2912605), (86, 2573930), (92, 2406065), (95, 2330084), (115, 1924852), (124, 1785145), (155, 1428116), (172, 1286965), (190, 1165042), (215, 1029572), (230, 962426), (310, 714058), (361, 613180), (380, 582521), (430, 514786), (437, 506540), (460, 481213), (589, 375820), (620, 357029), (713, 310460), (722, 306590), (817, 270940), (860, 257393), (874, 253270), (989, 223820), (1178, 187910), (1333, 166060), (1426, 155230), (1444, 153295), (1634, 135470), (1748, 126635), (1805, 122636), (1978, 111910), (2185, 101308), (2356, 93955), (2666, 83030), (2852, 77615), (2945, 75164), (3268, 67735), (3565, 62092), (3610, 61318), (3956, 55955), (4085, 54188), (4370, 50654), (4945, 44764), (5332, 41515), (5890, 37582), (6665, 33212), (7130, 31046), (7220, 30659), (8170, 27094), (8303, 26660), (8740, 25327), (9890, 22382), (11191, 19780), (11780, 18791), (13330, 16606), (13547, 16340), (14260, 15523)]