19918430

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 43241472

約数和(自身を除く): 23323042

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 67, 70, 134, 137, 155, 217, 274, 310, 335, 434, 469, 670, 685, 938, 959, 1085, 1370, 1918, 2077, 2170, 2345, 4154, 4247, 4690, 4795, 8494, 9179, 9590, 10385, 14539, 18358, 20770, 21235, 29078, 29729, 42470, 45895, 59458, 64253, 72695, 91790, 128506, 145390, 148645, 284549, 297290, 321265, 569098, 642530, 1422745, 1991843, 2845490, 3983686, 9959215, 19918430]

約数ペア:

[(1, 19918430), (2, 9959215), (5, 3983686), (7, 2845490), (10, 1991843), (14, 1422745), (31, 642530), (35, 569098), (62, 321265), (67, 297290), (70, 284549), (134, 148645), (137, 145390), (155, 128506), (217, 91790), (274, 72695), (310, 64253), (335, 59458), (434, 45895), (469, 42470), (670, 29729), (685, 29078), (938, 21235), (959, 20770), (1085, 18358), (1370, 14539), (1918, 10385), (2077, 9590), (2170, 9179), (2345, 8494), (4154, 4795), (4247, 4690)]