20123595980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{89}}^1\times {\mathrm{39119}}^1$

素因数の和:39251

約数の個数: 72

約数和(自身を含む): 45397195200

約数和(自身を除く): 25273599220

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 289, 340, 356, 445, 578, 890, 1156, 1445, 1513, 1780, 2890, 3026, 5780, 6052, 7565, 15130, 25721, 30260, 39119, 51442, 78238, 102884, 128605, 156476, 195595, 257210, 391190, 514420, 665023, 782380, 1330046, 2660092, 3325115, 3481591, 6650230, 6963182, 11305391, 13300460, 13926364, 17407955, 22610782, 34815910, 45221564, 56526955, 59187047, 69631820, 113053910, 118374094, 226107820, 236748188, 295935235, 591870470, 1006179799, 1183740940, 2012359598, 4024719196, 5030898995, 10061797990, 20123595980]

約数ペア:

[(1, 20123595980), (2, 10061797990), (4, 5030898995), (5, 4024719196), (10, 2012359598), (17, 1183740940), (20, 1006179799), (34, 591870470), (68, 295935235), (85, 236748188), (89, 226107820), (170, 118374094), (178, 113053910), (289, 69631820), (340, 59187047), (356, 56526955), (445, 45221564), (578, 34815910), (890, 22610782), (1156, 17407955), (1445, 13926364), (1513, 13300460), (1780, 11305391), (2890, 6963182), (3026, 6650230), (5780, 3481591), (6052, 3325115), (7565, 2660092), (15130, 1330046), (25721, 782380), (30260, 665023), (39119, 514420), (51442, 391190), (78238, 257210), (102884, 195595), (128605, 156476)]