20071220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:297

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 30731980

約数列:

[1, 2, 4, 5, 10, 13, 17, 19, 20, 26, 34, 38, 52, 65, 68, 76, 85, 95, 130, 170, 190, 221, 239, 247, 260, 323, 340, 380, 442, 478, 494, 646, 884, 956, 988, 1105, 1195, 1235, 1292, 1615, 2210, 2390, 2470, 3107, 3230, 4063, 4199, 4420, 4541, 4780, 4940, 6214, 6460, 8126, 8398, 9082, 12428, 15535, 16252, 16796, 18164, 20315, 20995, 22705, 31070, 40630, 41990, 45410, 52819, 59033, 62140, 77197, 81260, 83980, 90820, 105638, 118066, 154394, 211276, 236132, 264095, 295165, 308788, 385985, 528190, 590330, 771970, 1003561, 1056380, 1180660, 1543940, 2007122, 4014244, 5017805, 10035610, 20071220]

約数ペア:

[(1, 20071220), (2, 10035610), (4, 5017805), (5, 4014244), (10, 2007122), (13, 1543940), (17, 1180660), (19, 1056380), (20, 1003561), (26, 771970), (34, 590330), (38, 528190), (52, 385985), (65, 308788), (68, 295165), (76, 264095), (85, 236132), (95, 211276), (130, 154394), (170, 118066), (190, 105638), (221, 90820), (239, 83980), (247, 81260), (260, 77197), (323, 62140), (340, 59033), (380, 52819), (442, 45410), (478, 41990), (494, 40630), (646, 31070), (884, 22705), (956, 20995), (988, 20315), (1105, 18164), (1195, 16796), (1235, 16252), (1292, 15535), (1615, 12428), (2210, 9082), (2390, 8398), (2470, 8126), (3107, 6460), (3230, 6214), (4063, 4940), (4199, 4780), (4420, 4541)]