640617978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{106663}}^1$

素因数の和:106699

約数の個数: 64

約数和(自身を含む): 1720276992

約数和(自身を除く): 1079659014

約数列:

[1, 2, 3, 6, 7, 11, 13, 14, 21, 22, 26, 33, 39, 42, 66, 77, 78, 91, 143, 154, 182, 231, 273, 286, 429, 462, 546, 858, 1001, 2002, 3003, 6006, 106663, 213326, 319989, 639978, 746641, 1173293, 1386619, 1493282, 2239923, 2346586, 2773238, 3519879, 4159857, 4479846, 7039758, 8213051, 8319714, 9706333, 15252809, 16426102, 19412666, 24639153, 29118999, 30505618, 45758427, 49278306, 58237998, 91516854, 106769663, 213539326, 320308989, 640617978]

約数ペア:

[(1, 640617978), (2, 320308989), (3, 213539326), (6, 106769663), (7, 91516854), (11, 58237998), (13, 49278306), (14, 45758427), (21, 30505618), (22, 29118999), (26, 24639153), (33, 19412666), (39, 16426102), (42, 15252809), (66, 9706333), (77, 8319714), (78, 8213051), (91, 7039758), (143, 4479846), (154, 4159857), (182, 3519879), (231, 2773238), (273, 2346586), (286, 2239923), (429, 1493282), (462, 1386619), (546, 1173293), (858, 746641), (1001, 639978), (2002, 319989), (3003, 213326), (6006, 106663)]