20501970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:767

約数の個数: 64

約数和(自身を含む): 52614144

約数和(自身を除く): 32112174

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 43, 46, 69, 86, 115, 129, 138, 215, 230, 258, 345, 430, 645, 690, 691, 989, 1290, 1382, 1978, 2073, 2967, 3455, 4146, 4945, 5934, 6910, 9890, 10365, 14835, 15893, 20730, 29670, 29713, 31786, 47679, 59426, 79465, 89139, 95358, 148565, 158930, 178278, 238395, 297130, 445695, 476790, 683399, 891390, 1366798, 2050197, 3416995, 4100394, 6833990, 10250985, 20501970]

約数ペア:

[(1, 20501970), (2, 10250985), (3, 6833990), (5, 4100394), (6, 3416995), (10, 2050197), (15, 1366798), (23, 891390), (30, 683399), (43, 476790), (46, 445695), (69, 297130), (86, 238395), (115, 178278), (129, 158930), (138, 148565), (215, 95358), (230, 89139), (258, 79465), (345, 59426), (430, 47679), (645, 31786), (690, 29713), (691, 29670), (989, 20730), (1290, 15893), (1382, 14835), (1978, 10365), (2073, 9890), (2967, 6910), (3455, 5934), (4146, 4945)]