21398370

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1$

素因数の和:240

約数の個数: 128

約数和(自身を含む): 64143360

約数和(自身を除く): 42744990

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 31, 35, 38, 42, 57, 62, 70, 93, 95, 105, 114, 133, 155, 173, 186, 190, 210, 217, 266, 285, 310, 346, 399, 434, 465, 519, 570, 589, 651, 665, 798, 865, 930, 1038, 1085, 1178, 1211, 1302, 1330, 1730, 1767, 1995, 2170, 2422, 2595, 2945, 3255, 3287, 3534, 3633, 3990, 4123, 5190, 5363, 5890, 6055, 6510, 6574, 7266, 8246, 8835, 9861, 10726, 12110, 12369, 16089, 16435, 17670, 18165, 19722, 20615, 23009, 24738, 26815, 32178, 32870, 36330, 37541, 41230, 46018, 49305, 53630, 61845, 69027, 75082, 80445, 98610, 101897, 112623, 115045, 123690, 138054, 160890, 187705, 203794, 225246, 230090, 305691, 345135, 375410, 509485, 563115, 611382, 690270, 713279, 1018970, 1126230, 1426558, 1528455, 2139837, 3056910, 3566395, 4279674, 7132790, 10699185, 21398370]

約数ペア:

[(1, 21398370), (2, 10699185), (3, 7132790), (5, 4279674), (6, 3566395), (7, 3056910), (10, 2139837), (14, 1528455), (15, 1426558), (19, 1126230), (21, 1018970), (30, 713279), (31, 690270), (35, 611382), (38, 563115), (42, 509485), (57, 375410), (62, 345135), (70, 305691), (93, 230090), (95, 225246), (105, 203794), (114, 187705), (133, 160890), (155, 138054), (173, 123690), (186, 115045), (190, 112623), (210, 101897), (217, 98610), (266, 80445), (285, 75082), (310, 69027), (346, 61845), (399, 53630), (434, 49305), (465, 46018), (519, 41230), (570, 37541), (589, 36330), (651, 32870), (665, 32178), (798, 26815), (865, 24738), (930, 23009), (1038, 20615), (1085, 19722), (1178, 18165), (1211, 17670), (1302, 16435), (1330, 16089), (1730, 12369), (1767, 12110), (1995, 10726), (2170, 9861), (2422, 8835), (2595, 8246), (2945, 7266), (3255, 6574), (3287, 6510), (3534, 6055), (3633, 5890), (3990, 5363), (4123, 5190)]