19689700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:317

約数の個数: 72

約数和(自身を含む): 46212320

約数和(自身を除く): 26522620

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 43, 50, 76, 86, 95, 100, 172, 190, 215, 241, 380, 430, 475, 482, 817, 860, 950, 964, 1075, 1205, 1634, 1900, 2150, 2410, 3268, 4085, 4300, 4579, 4820, 6025, 8170, 9158, 10363, 12050, 16340, 18316, 20425, 20726, 22895, 24100, 40850, 41452, 45790, 51815, 81700, 91580, 103630, 114475, 196897, 207260, 228950, 259075, 393794, 457900, 518150, 787588, 984485, 1036300, 1968970, 3937940, 4922425, 9844850, 19689700]

約数ペア:

[(1, 19689700), (2, 9844850), (4, 4922425), (5, 3937940), (10, 1968970), (19, 1036300), (20, 984485), (25, 787588), (38, 518150), (43, 457900), (50, 393794), (76, 259075), (86, 228950), (95, 207260), (100, 196897), (172, 114475), (190, 103630), (215, 91580), (241, 81700), (380, 51815), (430, 45790), (475, 41452), (482, 40850), (817, 24100), (860, 22895), (950, 20726), (964, 20425), (1075, 18316), (1205, 16340), (1634, 12050), (1900, 10363), (2150, 9158), (2410, 8170), (3268, 6025), (4085, 4820), (4300, 4579)]