20839960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1613}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 52293600

約数和(自身を除く): 31453640

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1613, 1615, 2584, 3226, 3230, 6452, 6460, 8065, 12904, 12920, 16130, 27421, 30647, 32260, 54842, 61294, 64520, 109684, 122588, 137105, 153235, 219368, 245176, 274210, 306470, 520999, 548420, 612940, 1041998, 1096840, 1225880, 2083996, 2604995, 4167992, 5209990, 10419980, 20839960]

約数ペア:

[(1, 20839960), (2, 10419980), (4, 5209990), (5, 4167992), (8, 2604995), (10, 2083996), (17, 1225880), (19, 1096840), (20, 1041998), (34, 612940), (38, 548420), (40, 520999), (68, 306470), (76, 274210), (85, 245176), (95, 219368), (136, 153235), (152, 137105), (170, 122588), (190, 109684), (323, 64520), (340, 61294), (380, 54842), (646, 32260), (680, 30647), (760, 27421), (1292, 16130), (1613, 12920), (1615, 12904), (2584, 8065), (3226, 6460), (3230, 6452)]