21702015

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{331}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 39776256

約数和(自身を除く): 18074241

約数列:

[1, 3, 5, 9, 15, 31, 45, 47, 93, 141, 155, 235, 279, 331, 423, 465, 705, 993, 1395, 1457, 1655, 2115, 2979, 4371, 4965, 7285, 10261, 13113, 14895, 15557, 21855, 30783, 46671, 51305, 65565, 77785, 92349, 140013, 153915, 233355, 461745, 482267, 700065, 1446801, 2411335, 4340403, 7234005, 21702015]

約数ペア:

[(1, 21702015), (3, 7234005), (5, 4340403), (9, 2411335), (15, 1446801), (31, 700065), (45, 482267), (47, 461745), (93, 233355), (141, 153915), (155, 140013), (235, 92349), (279, 77785), (331, 65565), (423, 51305), (465, 46671), (705, 30783), (993, 21855), (1395, 15557), (1457, 14895), (1655, 13113), (2115, 10261), (2979, 7285), (4371, 4965)]