19981260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8539}}^1$

素因数の和:8567

約数の個数: 72

約数和(自身を含む): 65279760

約数和(自身を除く): 45298500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8539, 17078, 25617, 34156, 42695, 51234, 76851, 85390, 102468, 111007, 128085, 153702, 170780, 222014, 256170, 307404, 333021, 384255, 444028, 512340, 555035, 666042, 768510, 999063, 1110070, 1332084, 1537020, 1665105, 1998126, 2220140, 3330210, 3996252, 4995315, 6660420, 9990630, 19981260]

約数ペア:

[(1, 19981260), (2, 9990630), (3, 6660420), (4, 4995315), (5, 3996252), (6, 3330210), (9, 2220140), (10, 1998126), (12, 1665105), (13, 1537020), (15, 1332084), (18, 1110070), (20, 999063), (26, 768510), (30, 666042), (36, 555035), (39, 512340), (45, 444028), (52, 384255), (60, 333021), (65, 307404), (78, 256170), (90, 222014), (117, 170780), (130, 153702), (156, 128085), (180, 111007), (195, 102468), (234, 85390), (260, 76851), (390, 51234), (468, 42695), (585, 34156), (780, 25617), (1170, 17078), (2340, 8539)]