638520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{313}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 2034720

約数和(自身を除く): 1396200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 102, 120, 136, 170, 204, 255, 313, 340, 408, 510, 626, 680, 939, 1020, 1252, 1565, 1878, 2040, 2504, 3130, 3756, 4695, 5321, 6260, 7512, 9390, 10642, 12520, 15963, 18780, 21284, 26605, 31926, 37560, 42568, 53210, 63852, 79815, 106420, 127704, 159630, 212840, 319260, 638520]

約数ペア:

[(1, 638520), (2, 319260), (3, 212840), (4, 159630), (5, 127704), (6, 106420), (8, 79815), (10, 63852), (12, 53210), (15, 42568), (17, 37560), (20, 31926), (24, 26605), (30, 21284), (34, 18780), (40, 15963), (51, 12520), (60, 10642), (68, 9390), (85, 7512), (102, 6260), (120, 5321), (136, 4695), (170, 3756), (204, 3130), (255, 2504), (313, 2040), (340, 1878), (408, 1565), (510, 1252), (626, 1020), (680, 939)]